@article{GDZPPN001259369,
title = {Ordered semigroups containing minimal and maximal elements.},
journal = {Semigroup forum},
volume = {37},
year = {1988},
pages = {225-232},
zbl = {0639.06011},
url = {http://dml.mathdoc.fr/item/GDZPPN001259369}
}
Satyanarayana, M. Ordered semigroups containing minimal and maximal elements.. Semigroup forum, Tome 37 (1988) pp. 225-232. http://gdmltest.u-ga.fr/item/GDZPPN001259369/